Zinc oxide
Appearance
The "Scots" that wis uised in this airticle wis written bi a body that haesna a guid grip on the leid. Please mak this airticle mair better gin ye can. |
Names | |
---|---|
Ither names
Zinc white, calamine, filosofer's oo, Cheenese white, flouers o zinc
| |
Identifiers | |
3D model (JSmol)
|
|
ChEBI | |
ChEMBL | |
ChemSpider | |
EC Nummer | 215-222-5 |
PubChem CID
|
|
RTECS nummer | ZH4810000 |
| |
| |
Properties | |
ZnO | |
Molar mass | 81.406 g/mol[1] |
Appearance | White solit[1] |
Odour | Odourless |
Density | 5.1 g/cm3[1] |
Meltin pynt | 1,974 °C (3,585 °F; 2,247 K) (decompones)[1][5] |
Bylin pynt | 1,974 °C (3,585 °F; 2,247 K) (decompones) |
0.0004% (17.8°C)[2] | |
Baund gap | 3.3 eV (direct) |
Magnetic susceptibility | −27.2·10−6 cm3/mol[3] |
Refractive index (nD) | n1=2.013, n2=2.029[4] |
Structur[6] | |
Wurtzite | |
Space group | C6v4-P63mc |
a = 3.2495 Å, c = 5.2069 Å
| |
Formula units (Z)
|
2 |
Tetrahedral | |
Thermochemistry[7] | |
Speceefic heat capacity, C | 40.3 J·K−1mol−1 |
Staundart molar entropy S |
43.7±0.4 J·K−1mol−1 |
Std enthalpy o formation ΔfH |
-350.5±0.3 kJ mol−1 |
Gibbs free energy (ΔfG˚)
|
-320.5 kJ mol−1 |
Pharmacology | |
QA07XA91 (WHO) | |
Hazards | |
Safety data sheet | ICSC 0208 |
EU clessification | Dangerous for the environment (N) |
R-phrases | R50/53 |
S-phrases | S60, S61 |
NFPA 704 | |
Flash pynt | 1,436 °C (2,617 °F; 1,709 K) |
Lethal dose or concentration (LD, LC): | |
LD50 (Median dose)
|
240 mg/kg (intraperitoneal, rat)[8] 7950 mg/kg (ratton, oral)[9] |
LC50 (Median concentration)
|
2500 mg/m3 (moose)[9] |
LCLo (Lawest published)
|
2500 mg/m3 (guinea pig, 3–4 h)[9] |
US heal exposur leemits (NIOSH): | |
PEL (Permissible)
|
TWA 5 mg/m3 (fume) TWA 15 mg/m3 (tot dist) TWA 5 mg/m3 (resp dist)[2] |
REL (Recommendit)
|
Dust: TWA 5 mg/m3 C 15 mg/m3 Fume: TWA 5 mg/m3 ST 10 mg/m3[2] |
IDLH (Immediate danger)
|
500 mg/m3[2] |
Relatit compoonds | |
Ither anions
|
Zinc sulfide Zinc selenide Zinc telluride |
Ither cations
|
Cadmium oxide Mercury(II) oxide |
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Zinc oxide is an inorganic compoond wi the formula ZnO.
References
[eedit | eedit soorce]- ↑ a b c d Haynes, p. 4.100
- ↑ a b c d NIOSH Pocket Guide tae Chemical Hazards 0675
- ↑ Haynes, p. 4.136
- ↑ Haynes, p. 4.144
- ↑ Takahashi, Kiyoshi; Yoshikawa, Akihiko; Sandhu, Adarsh (2007). Wide bandgap semiconductors: fundamental properties and modern photonic and electronic devices. Springer. p. 357. ISBN 978-3-540-47234-6.
- ↑ Haynes, p. 4.152
- ↑ Haynes, pp. 5.3, 5.16
- ↑ Zinc oxide. Chem.sis.nlm.nih.gov. Retrieved on 2015-11-17.
- ↑ a b c "Zinc oxide". Immediately Dangerous to Life and Health. National Institute for Occupational Safety and Health (NIOSH).
This science-relatit airticle is a stub. Ye can help Wikipaedia bi expandin it. |